BetDSI (Diamond Sportsbook) was founded in 1998 during the initial online gambling boom. BetDSI formed strategic software partnerships to offer the best online sports betting experience possible. BetDSI operates in Costa Rica along with some of the other top US sportsbook in the industry. BetDSI has a strong player base in the United States, but the sportsbook accepts a lot of global bettors and has become one of the best mixed martial arts sportsbooks in the industry.